Purge Docker containers/images

dclean: bashrc

# Bash
function dclean {
    if [ ! -z "$1" ]; then
        if [ "$1" = "restart" ]; then
            sudo service docker restart
            sleep 3
        fi
    fi
    export CONTAINERS=`docker ps -a -q`
    export IMAGES=`docker images -q --filter "dangling=true"`

    if [ "$CONTAINERS" ]; then
        echo "Deleting non-running containers:"
        docker rm `docker ps -a -q`
    else
        echo "No existing containers..."
    fi

    if [ "$IMAGES" ]; then
        echo "Deleting dangling images:"
        docker images -q --filter "dangling=true" | xargs docker rmi
    else
        echo "No dangling images..."
    fi
}

dclean: config.fish

# Fish
function dclean
    if [ $argv[1] ]
        if [ $argv[1] = 'restart' ]
            sudo service docker restart
            sleep 3
        end
    end
    set -l CONTAINERS (docker ps -a | grep Exited | cut -f1 -d ' ')
    set -l IMAGES (docker images -q --filter "dangling=true")

    if [ $CONTAINERS[1] ]
        echo "Deleting non-running containers:"
        docker rm (docker ps -a | grep Exited | cut -f1 -d ' ')
    else
        echo "No existing containers..."
    end

    if [ $IMAGES[1] ]
        echo "Deleting dangling images:"
        docker images -q --filter "dangling=true" | xargs docker rmi
    else
        echo "No dangling images..."
    end
end